They are cold-blooded animals and most species of lizards are harmless but they scare most the humans specially Kids. People dislike lizards because of their slimy skin. The only ways in which a lizard can cause any kind of damage is by leaving behind its droppings and eggs in completely unexpected places, such as between the clothes in our closets, or in a corner of an open loft, or even, simply, in some nook on the floor.